Steve Jobs wanted his Mac to be the opposite of the IBM PC, and part of that was "no Control key, no Alt key, and no function keys." He changed his mind eventually.
My first Mac was a Mac Plus, no hard drive, 1 MB of RAM. Bought it as a grad student at The University of Texas as Austin.
macOS has evolved quite a bit. The first version-- Mac OS X-- removed the Mac's Apple menu, something a lot of us were very comfy with.
Steve Jobs said "Artists should sign their work." He thought of the original Mac as art, so he had people who worked on it sign it. Inside the case.